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(11) | EP 1 283 403 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Heat transfer member and method for manufacturing same |
(57) A heat transfer (100) member for a heat exchanger, is press-formed of a metallic
thin sheet material into a prescribed shape by means of molds of a press forming device
so that the heat transfer member has on at least one portion thereof a heat transfer
face having opposite surfaces, which are to be brought into contact with heat exchange
fluids, respectively. The heat transfer face comprises at least one set of irregularity
patterns arranged in a row. Each of the at least one set of irregularity pattern units
comprises (i) a central pattern portion (111) having a plurality of recesses or projections
provided with a prescribed pitch, (ii) a pair of heat exchanging irregularity pattern
portions (112) provided on opposite sides of the central pattern portion (111) so
as to be symmetrical with respect to the central pattern portion and (iii) at least
one boundary pattern portion (113) provided on at least one of respective outer sides
of the pair of heat exchanging irregularity pattern portions (112) so as to be adjacent
to the respective outer sides thereof. The boundary pattern portion (113) has a prescribed
width and a plurality of recesses or projections provided with a same pitch as the
plurality of recesses or projections of the central pattern portion (111) so as to
be in parallel therewith. |